Electric trigger assembly for staple guns

Abstract

A staple gun includes an electro-magnetic valve recevied in a recess in the handle and an opening communicates with the main passage in the handle and the recess. The electro-magnetic valve has a shaft which movably seals the opening. A sensor connected to a distal end of a nose of the staple gun, a circuit board, and the electro-magnetic valve are connection electrically. A button switch, a mold switch, an adjusting pulse switch and a battery set are connected to the circuit board so that the mold switch activates various independent circuits and controls a number of reciprocating movement of the shaft of the electro-magnetic valve.

What is claimed is:  
     
       1. A staple gun comprising: 
       a barrel with a chamber defined therein and a cylinder received in the chamber, a piston movably received in the cylinder and a plate connected to the piston, a nose connected to a front end of the barrel and the plate extending through the nose, an end mount assembly connected to a rear end of the barrel and an end cap movably sealing an open end of the cylinder, a spring biased between the end cap and an inside of the end mount assembly, a sensor is connected to a distal end of the nose, the sensor being activated by a movement of a safety member movably mounted to the nose;  
       a handle connected to the barrel and a main passage defined in the handle, the main passage communicating with the chamber in the barrel, an opening defined through a wall of the handle and communicating with a recess in the handle, an electro-magnetic valve engaged with the recess and having a shaft which is movable to seal the opening, a circuit board connected to the handle and electrically connected to the sensor and the electro-magnetic valve, wherein the circuit board, the sensor, and the electro-magnetic valve forms a circuit to control the movement of the shaft to seal the opening, and  
       a button switch, a mold switch, an adjusting pulse switch and a battery set connected to the circuit board, the mold switch activating various independent circuits and controlling a number of reciprocating movement of the shaft of the electro-magnetic valve.  
     
     
       2. The staple gun as claimed in  claim 1 , wherein the sensor is electrically connected to the button switch in series. 
     
     
       3. The staple gun as claimed in  claim 1 , wherein the sensor is electrically connected the button switch in series and the adjusting pulse switch is electrically connected to the sensor and the button switch in parallel. 
     
     
       4. The staple gun as claimed in  claim 1 , wherein the electro-magnetic valve comprises a casing in which a coil, the shaft and the spring are received, the coil engaged in an inside of the casing and the shaft extending though the casing, the spring being biased between the casing and the shaft. 
     
     
       5. A staple gun comprising: 
       a barrel with a chamber defined therein and a cylinder received in the chamber, a piston movably received in the cylinder and a plate connected to the piston, a nose connected to a front end of the barrel and the plate extending through the nose, an end mount assembly connected to a rear end of the barrel and an end cap movably sealing an open end of the cylinder, a spring biased between the end cap and an inside of the end mount assembly, a sensor is connected to a distal end of the nose, the sensor being activated by a movement of a safety member movably mounted to the nose;  
       a handle connected to the barrel and a main passage defined in the handle, the main passage communicating with the chamber in the barrel, an opening defined through a wall of the handle and communicating with a recess in the handle, an electro-magnetic valve engaged with the recess and having a shaft which is movable to seal the opening, a circuit board connected to the handle and electrically connected to the sensor, the electro-magnetic valve, mold switch and adjusting pulse switch so as to move the shaft of the electro-magnetic valve to seal the opening, a button switch and a battery set connected to the circuit board, the mold switch activating various independent circuits and controlling a number of reciprocating movement of the shaft of the electro-magnetic valve.  
     
     
       6. The staple gun as claimed in  claim 5 , wherein the sensor is electrically connected to the button switch in series. 
     
     
       7. The staple gun as claimed in  claim 5 , wherein the sensor is electrically connected the button switch in series and the adjusting pulse switch is electrically connected to the sensor and the button switch in parallel. 
     
     
       8. The staple gun as claimed in  claim 5 , wherein the electro-magnetic valve comprises a casing in which a coil, the shaft and the spring are received, the coil engaged in an inside of the casing and the shaft extending though the casing, the spring being biased between the casing and the shaft.